The potential energy, in Joules, of an object is described by the formulaP.E. = mgh, where m = mass in kg, g = acceleration due to gravity in m/s2, andh = altitude in meters. Find the height above sea level of a 60 kg object with apotential energy equal to 4 × 106 Joules. Assume g = 10 m/s2. Round answer to the nearest meter.
Question
The potential energy, in Joules, of an object is described by the formulaP.E. = mgh, where m = mass in kg, g = acceleration due to gravity in m/s2, andh = altitude in meters. Find the height above sea level of a 60 kg object with apotential energy equal to 4 × 106 Joules. Assume g = 10 m/s2. Round answer to the nearest meter.
Solution 1
To find the height above sea level of the object, we can rearrange the formula for potential energy to solve for h. The formula is P.E. = mgh, so solving for h gives us h = P.E. / (mg).
Given that the mass m = 60 kg, the acceleration due to gravity g = 10 m/s², and the potential energy P.E. = 4 × 10⁶ Joules, we can substitute these values into the formula:
h = (4 × 10⁶ J) / (60 kg * 10 m/s²) = 6666.67 meters.
Rounding to the nearest meter gives us a height of 6667 meters above sea level.
Solution 2
To find the height above sea level of the object, we can rearrange the formula for potential energy to solve for h. The formula is P.E. = mgh, so solving for h gives us h = P.E. / (mg).
Given that the mass m = 60 kg, the acceleration due to gravity g = 10 m/s², and the potential energy P.E. = 4 × 10⁶ Joules, we can substitute these values into the formula:
h = (4 × 10⁶ J) / (60 kg * 10 m/s²) = 6666.67 meters.
Rounding to the nearest meter gives us a height of 6667 meters above sea level.
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